August 13, 2014
ME706 Acoustics and Aerodynamic Sound
Howe, M. S. “Theory of Vortex Sound” (paperback)
Cambridge University Press, 2003.
|ME706 Acoustics and Aerodynamic Sound is a practical course dealing with the problem of how to estimate the conversion of hydrodynamic (“rotational”) kinetic energy of a fluid flow into the longitudinal disturbances we call sound. Great care will be taken to discuss underlying fluid mechanical and acoustic concepts and principles.|
|A considerable number of familiar and important noisy flows occur at low Mach numbers (<0.4) to which we confine ourselves. Many idealized hydrodynamic model problems involving the production of sound by unsteady flow adjacent to solid boundaries are investigated (“vortex-surface” interactions) by the powerful and universal method of “compact Green’s function”, which provides a routine procedure for estimating the sound and an easy identification of those parts of a structure that are likely to be important sources of sound.|
|These interactions are simple enough for the student to acquire an intuitive understanding of the method of solution and of the underlying physics, and each student project will consist of a numerical determination of the sound produced by such a vortex-surface interaction.|
|Model scale experimental determination of the sound produced when a high speed train enters a tunnel with a modified portal. (From Howe et al., Journal of Sound and Vibration 311 (2008) 254-268).
Working knowledge of Multivariate Calculus; some familiarity with fluid mechanics, acoustics or continuum mechanics will be useful, but is not essential. (The book “Mathematical Methods for Mechanical Sciences” is available for free download in pdf form from the ME706 website).
Download the a PDF of the ME 706 Acoustics and Aerodynamic Sound course syllabus.
* One take-home examination
* One Project
|Course material will be available on Blackboard for enrolled students.|
ME 706 Acoustics and Aerodynamic Sound
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